Hi, this is not a bug but a feature.
dvd+rw-format.cpp interprets option -ssa by: else if (argv[i][1] == 's') // -ssa|-spare ... { if (p[1]=='n') ssa=-1; // =none and later decides to silently bail out by: else if (mmc_profile==0x41) // BD-R ... { case -1: // no spare -> nothing to do case 0: exit (0); break; By giving option -ssa=none you request a BD-R with zero Spare Area. No Spare Area means no opportunity to replace bad blocks, which is the main reason for formatting BD-R. I am not sure whether one really needs a Spare Area for Pseudo Overwrite, another feature which dvd+rw-tools enables by formatting. But Andy Polyakov is the only free software developer i know of, who explored Pseudo Overwrite yet. So if he decided not to format, there may be a reason. Have a nice day :) Thomas